Bump pillow from 8.4.0 to 9.5.0 in /tools

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.4.0 to 9.5.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/8.4.0...9.5.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/tools/wptrunner/requirements.txt b/tools/wptrunner/requirements.txt
index bfd2193..b7d3524 100644
--- a/tools/wptrunner/requirements.txt
+++ b/tools/wptrunner/requirements.txt
@@ -3,7 +3,7 @@
 mozinfo==1.2.2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1621226
 mozlog==7.1.1
 mozprocess==1.3.0
-pillow==9.4.0
+pillow==9.5.0
 requests==2.28.2
 six==1.16.0
 urllib3[secure]==1.26.15